In my game, I set the Layout size with a width of 1280 pixels and a height of 1280 pixels too. But I'm using a Windows size with a width of 300px and a height of 200px. When I'm designing my game, I see all the images are seeing great but if I run this layout all the images get pixalated and they look very blur.

What am I missing ?... or how can I clear my images ? (I'm using Inkscape to draw them as vector graphs and then I export them to PNG)